well this is a major question now ki baba ko ashni ke bare mein kaise pata chalega ??
n my mind is hinting That MALLU WILL TELL BB EVRYTHN ABOUT ASHNI BY CHANCE ..AS SHE DOESNT KNOW THAT BB DOESNT KNOW ANYTHN ABOUT ASHNI .
so i think she will come to ashu's house to give her shaadi ka card of marrying jagan n BB will ask her that y she dint marry ashu ...n she will say that ashu is in love with nidhi that's y he rejected her proposal ...n finally BB ko sab pata chal jayega ...n later he will do planning with armaan on how to reunite ashni 😉